Mr. Penumbra’s 24-Hour Bookstore by Robin Sloan was not quite what I expected. The novel is about Clay, an out-of-work guy in San Fransisco who ends up landing a job at Mr. Penumbra’s 24-Hour Bookstore. He works the late shift and the very few customers that come in are odd. They don’t buy new books, but check out giant, odd tomes from the back shelves. Clay begins to investigate further and discovers a mystery within Mr. Penumbra’s store. The writing is not great and the characters are rather flat, but the mystery did keep me reading until the end.